New Power Trio: Taylor Swift, Jon Bon Jovi and . . . Prince William?

Taylor Swift had the best afterparty of any artist at the American Music Awards Sunday (Nov. 24), where she won four trophies, including the top prize.

She kicked it in England with Prince William and rocker Jon Bon Jovi and a few thousand of their friends. The event was the swanky annual Winter Whites Gala, which raises money for homeless kids and teens in Great Britain.

"It's awesome, 'cause when you see someone from afar and you respect the way they carry themselves, and you meet them and they're funny, that's a whole cool different exciting realization."

And Taylor was definitely into the charity's cause.

"The fact that this is highlighting a charity that focuses on teens from 16 to their mid-20s who are homeless . . . I think that that is an amazing thing to focus on and to draw attention to," she said.

"I've always really respected Prince William and I think that just getting to be a part of tonight . . . getting the invitation, I knew it was gonna be a lot of travel—I kinda walked right offstage after making an acceptance speech at the AMAs and got right on a plane—but it was worth it!"

Better still, Taylor got to sing with Prince William and Bon Jovi onstage for a version of "Livin' on a Prayer."